Shape effect of magnetic source on stabilizing range of vertical diamagnetic levitation

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Article number6034526
Pages (from-to)26-30
Journal / PublicationIEEE Transactions on Magnetics
Volume48
Issue number1
Publication statusPublished - Jan 2012

Abstract

This paper presents the results of a study on the shape effect of magnetic sources formed by standard coil and ring magnet elements on vertical diamagnetic levitation. The maximum stabilizing range, D max, of a permanent-magnet floater levitated with the assistance of two diamagnetic graphite plates and powered with magnetic sources of different shapes was measured experimentally. The results were found to be well-correlated with theoretical data. The effectiveness of a shaped field source was determined by comparing its D max to that of a single standard coil equivalent with the same total thickness, turns, and applied current. For the permanent magnetic sources, the comparison was to a single ring magnet of the same total thickness, volume, and residual flux. The results indicate that a cone-shaped source of either electromagnet or permanent magnet has positive effects. Theoretical analyses suggest that acquiring a levitation position farther from the magnetic source and a smaller magnitude in B″ are significant in obtaining a larger stabilizing range. © 2006 IEEE.

Research Area(s)

  • Diamagnetic levitation, stabilizing range

Citation Format(s)

Shape effect of magnetic source on stabilizing range of vertical diamagnetic levitation. / Chow, T. C S; Wong, P. L.; Liu, K. P.
In: IEEE Transactions on Magnetics, Vol. 48, No. 1, 6034526, 01.2012, p. 26-30.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review